Observation of intense second harmonic generation from MoS2 atomic crystals
Abstract
The nonlinear optical properties of few-layer MoS2 two-dimensional crystals are studied using femtosecond laser pulses. We observed highly efficient second-harmonic generation from the odd-layer crystals, which shows a polarization intensity dependence that directly reveals the underlying symmetry and orientation of the crystal. Additionally, the measured second-order susceptibility spectra provide information about the electronic structure of the material. Our results open up opportunities for studying the nonlinear optical properties in these two-dimensional crystals.
- Publication:
-
Physical Review B
- Pub Date:
- May 2013
- DOI:
- 10.1103/PhysRevB.87.201401
- arXiv:
- arXiv:1304.4289
- Bibcode:
- 2013PhRvB..87t1401M
- Keywords:
-
- 42.65.Ky;
- 42.70.Mp;
- 78.67.-n;
- 81.05.Hd;
- Frequency conversion;
- harmonic generation including higher-order harmonic generation;
- Nonlinear optical crystals;
- Optical properties of low-dimensional mesoscopic and nanoscale materials and structures;
- Other semiconductors;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 5 pages, 3 figures